Stoker construction



Dec'. 29, 1936. R. L. BEERS STOKER CONSTRUCTION Filed April 5, 1954 2Sheets-Sheet l INVENTOR ATTORNEYS Dec. 29, 1936. R BEERS 2,065,553

s'oxER CONSTRUCTION Filed April 3, 19:54 2 sheets-sheet 2 Fig/4 ce eers-INVENTOR ATTOFINEY Patented Dec. 29, 193e PATENT OFFICE STOKEBCONSTRUCTION Royce L. Beers, Detroit, Mich., assigner to Detroit StokerCompany, Detroit, Mich., a corporation of Michigan Application April 3,1934, Serial No. 718,834

9 Claims. (Cl. 11o- 101) 'I'his invention relates generally to stokers,especially to those of the sprinkler type, and consists of certain noveldetails of construction, conibinations and arrangements of parts, thatwill be hereinafter more fully described and particularly pointed out inthe appended claims.

One of the `essential objects of the invention is to provide an improvedapron tuyre and wear plate assembly.

Another object is to provide an assembly of this type wherein the wearplate straddles and protects the lower edge of a fuel feed opening in acasting carried by an upright plate upon the front wall of the furnace.

in the apron tuyres have upper and lower portions joined together attheir rear ends and extending toward and cooperating with the wear plateand upright plate aforesaid to form a windbox or air chamber.

Another object is to provide an assembly wherein the upper portions ofthe apron tuyres'extend rearward from the wear plate and the lowerportions of said tuyres are provided upon their underside with a hightemperature heat resisting substance.

Another object is to provide an assembly wherein the means forsupporting the apron tuyres preferably comprises means on the uprightplate holding in juxtaposition a portion of the wear plate and the upperportions of the apron tuyres.

Other objects, advantages and novel details of construction of thisinvention will be made more apparent as this description proceeds,especially when considered in connection with the accompanying drawings,wherein:

Figure l is a fragmentary vertical sectional view through a stokerconstruction embodying my invention in a plane adjacent to one endthereof;

Figure 2 is a front elevation of the wear plate;

Figure 3 is a sectional view taken on the line 3--3 of Figure 2,;

Figure 4 is a side elevation of one of the-apron tuyres with therefractory material shown in section;

Figure 5 is an end elevation of the tuyre illustrated in Figure 4;

Figure `6 is a sectional view taken on the line 6-6 of Figure 4.

Referring now to the drawings, A is an upright plate adapted to besecured upon the front wall of a furnace and having a substantiallyrectangular fuel feed opening I therein, and B is a substantiallyrectangular basev plate mounted upon the outer side of the upright plateA and having a substantially rectangular opening 2 therein registeringwith the opening I. Preferably the base plate B is a casting and has ashoulder 2l which projects rearwardly over the lower edge I of theAnother object is to provide an assembly whereopening I in the plate A.C is a rotor in front of said casting B opposite the lower edge 3 oftheopening 2 and provided with suitable blades D for projecting fuelyrearwardly through said opening into the furnace. E is a hopper for thefuel; F is a distributor platebeneath said hopper and .adjustable overan edge I of the rotor housing G; and H is a ram for pushing onto therotor C the fuel that is received on the plate F from the hopper E.

J is the wear plate and K are the apron tuyres embodying my invention.As shown, the wear plate J extends lengthwise of and straddles the loweredge 3 of the fuel feed opening 2 in the casting B. The front dependingportion 5 of said plate is substantially ilushwith the frontl face 6 ofthe castingand. has interlocking engagement with the latter, while therear depending portion` 'I is upon and substantially at against therearl face of said casting. Preferably the intermediate top 8 of thewear plate inclines downwardly and rearwardly from the front portion 5to the rear portion l.

The apron tuyres K project rearwardly fromthe wear plate J and arepreferably supported from a bracket L fastened to the front plate A. Anysuitable means such as the bolts I2a and nuts I2b may be employed forfastening the bracket L to the plate A. Preferably the tuyres K of theapron are arranged side by side and are alike in construction. As shown,each tuyre K has a body M of cast iron and a protecting covering N ontheunderside thereof of high temperature heat resisting cement. The upperportion I0 of each tuyre body has a hook-shaped por tion II disposed o nthe bracket L between an upstanding portion I2 thereof and the rearvdepending portion 'I ofthe wear plate and is inclined downwardly andvrearwardly approximately in alignment with the inclined top 8 of thewear plate. The lower portion I3 of each tuyre body M has a relativelywide and thick web I4 that extends downwardly from the upper portion I0at its lower end, thence forward and terminates in a depending portionI5 which abuts the rear face of a depending portion I6 of the bracketand has a forwardly offset portion I8 bearing against the rear face ofthe bracket on the plate A. Projecting downwardly from the upper p0rtlonI0 at the lower end thereof, thence forwardly to the depending portionf5 at the upper end of the offset portion I8 is a longitudinallyextending web I9 of less width than the web I4. Located between andconnected to the Webs I4 and I8 is a longitudinally extending uprightweb 20, while disposed upon opposite sides of thisweb between and atspaced points of the webs I4 and I9 are transversely eiitending ribs 22.The cement N envelopes and is suspended from the webs I9 and 2l and ribs22 between the lower endof the upper portion l0 and the dependingportion I5 of the lower portion. Preferably the lower face 2l of thiscement is flush with the lower end 24 of the oil'set portion I8 andcurves upwardly to and is substantially flush with the rear face 25 ofthe upper portion i0. To insure a firm bond between the-parts, the web20 is preferably apertured upon opposite sides of the ribs 22 to receiveportions of the cement. Preferably suitable slots 26 for the passage ofair are provided in the upper portion I0. cesses or notches 28 and 29respectively are provided in the upper portion I0 and cement N atopposite sides thereof for the passage of air. In fact, the tuyres areconstructed and arranged in such a way that they-cooperate with theupright plate A and` wear plate J to form a windbox or air chamber.

What I claim as my invention is: A

l. In a stoker, anupright plate adapted to be secured upon the frontwall of a furnace and having a fuel feed opening therein, a base platemounted upon said upright plate and having an opening registering withthe opening in said upright plate, a wear plate protecting the loweredge of the opening in the base plate, a bracket mounted upon saidupright plate, and a tuyre supported from said bracket, portions of saidwear plate and tuyre being approximately in alignment and incliningdownwardly and rearwardly relative to said upright plate.

2. In a stocker, an upright plate adapted to be secured upon the frontwall of a furnace and having a fuel feed opening therein, a base platemounted upon the front of said upright plate and having an openingregistering with the opening in said upright plate, a wear plateprotecting the lower edge of the opening in the base plate. a bracketmounted upon the rear of said upright plate, and a tuyre supported fromsaid bracket,

portions of said wear plate and tuyre being approximately in alignmentand inclining downwardly and rearwardly relative to said upright plaie.

3. In a'stoker, an upright plate having an open-- ing therein, a baseplate mounted upon the front of said upright plate and having an openingregistering with the opening in the upright plate, an invertedchannel-shaped wear plate straddling and protecting the lower edge ofthe opening in the base plate, a bracket fastened to the rear of saidupright plate, and a tuyre supported from said bracket and forming withthe same and said upright plate a windbox, portions of said tuyre andwear plate being approximately inl alignment and inclining downwardlyand rearwardly relative to said upright plate.

4. In a stoker. an upright plate having an opening therein, a base plateon the upright plate and having a fuel feed opening registering with theopening in said upright plate, a bracket fastened to the upright plate,a wear plate straddling and protecting an edge of the opening in thebase plate, and a tuyre supported 4from the bracket and having a portionforming a rearward exte sion from the wear plate.

5. In a stoker, a tuyre having a body of metal, and a protectingcovering on the underside thereof of high temperature heat resistingcement, the upper portion of the body having a part for attachment to asuitable support and inclining downwardly and rearwardly, the lowerportion of said body extending at substantially an acute angle to theupper portion and comprising a Likewise, re-

relatively wide upper web, a relatively narrow lower web substantiallyparallel to said wide web, and an upright web extending between andterminally connected to the wide and narrow webs, the cement aforesaidenveloping and being suspended from the narrow and upright webs, slotsfor the passage of air being provided in' the upper portion of the body,and recesses being provided in the cement for the passage of air.

6. In a stoker, a tuyre having a body of metal, and a protectingcovering on the underside thereof of high temperature heat resistingcement, the upper portion of the body having a part for attachment to asuitable support and inclining downwardly and rearwardly, the lowerportion of said body extending at substantially an acute angle to theupper portion and being in the form of a relatively wide web, said webbeing provided at its free end with a depending portion, a relativelynarrow web extending from said depending portion in substantiallyparallel relation to the wide web and then upward to the lower end ofthe upper portion of the body, and an upright web extending between andterminally connected to the wide and narrow webs, the cement aforesaidenveloping and being suspended from the narrow l and upright webs, thelower face ofsaid cement being substantially flush with the lower end ofsaid depending portion and curving upwardly and being substantiallyilush with the lower end of the upper portion of said body.

7. In a stoker, a tuyre having a body of metal. and a protectingcovering on the underside thereof of high temperature heat resistingcement, the upper portion of the body having a part for attachment to asuitable support and inclining downwardly and rearwardly, the lowerportion of said body extending at substantially an acute angle to theupper portion and having substantially parallel webs. and an upright webextending between and connected to the parallel webs, the lower of saidparallel webs being narrower than the upper, the cement aforesaidenveloping and being Asuspended from said upright and narrow webs, slotsfor the passage of air being provided in the upper portion oi' the body,and recesses being provided in the cement for the passage of air.

8. In a stoker, the combination with an upright plate having a fuelfeeding opening therein, of a hollow member detachably secured to saidplate beneath said opening having a top portion or apron incliningdownwardly and rearwardly therefrom and a lower portion returningapproximately to said plate, the space within said hollow member formingan air chamber with a discharge opening at the rear end of said apron,and the lower portion of said hollow member being provided with a heatresisting protecting cover.

9. In a stoker, the combination with an upright plate having a fuelfeeding opening therein of a hollow member having a detachable hookedengagement with said plate beneath said opening, said member having anapron portion inclining downwardly and rearwardly from said opening, alower portion returning approximately to said plate and forming an s irchamber between the same and said apron with discharge openings at therear end of said apron, the lower portion of said hollow member beingprovided with s protecting cover of heat insulating material.

ROYCI L. m.

